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How to calculate volume of surf plot (3d plot) en matlab?

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abdelmadjid benrabah
abdelmadjid benrabah on 17 Sep 2021 at 12:49
Commented: Star Strider on 17 Sep 2021 at 15:37
How to calculate volume of surf plot (3d plot) en matlab?
using variable x and y and function z

Accepted Answer

Star Strider
Star Strider on 17 Sep 2021 at 13:24
The surf plot arguments are matrices, so use trapz:
x = 1:10;
y = 1:20;
[X,Y] = meshgrid(x,y);
z = exp(-((X-5)/5.*(Y-10)/10).^2)
z = 20×10
0.5955 0.7471 0.8784 0.9681 1.0000 0.9681 0.8784 0.7471 0.5955 0.4449 0.6639 0.7942 0.9027 0.9747 1.0000 0.9747 0.9027 0.7942 0.6639 0.5273 0.7308 0.8383 0.9246 0.9806 1.0000 0.9806 0.9246 0.8383 0.7308 0.6126 0.7942 0.8784 0.9440 0.9857 1.0000 0.9857 0.9440 0.8784 0.7942 0.6977 0.8521 0.9139 0.9608 0.9900 1.0000 0.9900 0.9608 0.9139 0.8521 0.7788 0.9027 0.9440 0.9747 0.9936 1.0000 0.9936 0.9747 0.9440 0.9027 0.8521 0.9440 0.9681 0.9857 0.9964 1.0000 0.9964 0.9857 0.9681 0.9440 0.9139 0.9747 0.9857 0.9936 0.9984 1.0000 0.9984 0.9936 0.9857 0.9747 0.9608 0.9936 0.9964 0.9984 0.9996 1.0000 0.9996 0.9984 0.9964 0.9936 0.9900 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000
zvol = trapz(x,trapz(y,z))
zvol = 158.0451
figure
surf(x, y, z)
grid on
.
  4 Comments
Star Strider
Star Strider on 17 Sep 2021 at 15:37
My pleasure!
If my Answer helped you solve your problem, please Accept it!
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